<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { userLoginService, userRegisterService } from '@/api/user.js'
import { useRouter } from 'vue-router'
import { useUserStore } from '@/stores/index.js'
const isRegister = ref(false)

defineOptions({
  name: 'LoginPage'
})

/*
 * （1）el-form => :model="ruleForm 绑定的整个form的数据对象 {xxx，xxx，xxx}
 * （2）el-form => :rules="rules" 绑定的整个rules规则对象 {xxx，xxx，xxx}
 * （3）表单元素 => v-model="ruleForm.xxx" 给表单元素，绑定form的子属性
 * （4）el-form-item => prop 配置生效的是哪个校验规则（和rules中的字段要对应）
 * */

// 用于提交的注册表单对象
const registerFormModel = ref({
  username: '',
  password: '',
  repassword: ''
})

// 注册表单校验规则
const registerFormRules = ref({
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 5, max: 10, message: '用户名必须为 5 ~ 10 位', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,16}$/,
      message: '密码必须为 6 ~ 16 位非空字符',
      trigger: 'blur'
    }
  ],
  repassword: [
    { required: true, message: '请再次输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,16}$/,
      message: '密码必须为 6 ~ 16 位非空字符',
      trigger: 'blur'
    },
    {
      validator: (rule, value, callback) => {
        if (value !== registerFormModel.value.password)
          callback(new Error('两次输入的密码不一致'))
        else callback()
      },
      trigger: 'blur'
    }
  ]
})

// 点击注册时再次校验表单内容是否正确
const form = ref()
const register = async () => {
  await form.value.validate()
  await userRegisterService(registerFormModel.value)
  ElMessage.success('注册成功！')
  // 切换到登录
  isRegister.value = false
}

// 登录
const userStore = useUserStore()
const router = useRouter()
const login = async () => {
  await form.value.validate()
  const {
    data: { token }
  } = await userLoginService(registerFormModel.value)
  // 将 token 存入 pinia
  userStore.setToken(token)
  ElMessage.success('登录成功！')
  await router.push('/')
}
</script>

<template>
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="8" :offset="2" class="form">
      <!-- 注册表单 -->
      <el-form
        ref="form"
        :model="registerFormModel"
        :rules="registerFormRules"
        size="large"
        autocomplete="off"
        v-if="isRegister"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="registerFormModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="registerFormModel.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
            show-password
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
            v-model="registerFormModel.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
            show-password
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="register"
            class="button"
            type="primary"
            auto-insert-space
          >
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            <el-link type="primary" :underline="true">去登录</el-link>
          </el-link>
        </el-form-item>
      </el-form>

      <!-- 登录表单 -->
      <el-form
        :model="registerFormModel"
        :rules="registerFormRules"
        ref="form"
        size="large"
        autocomplete="off"
        v-else
      >
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="registerFormModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="registerFormModel.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="login"
            class="button"
            type="primary"
            auto-insert-space
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            <el-link type="primary" :underline="true">去注册</el-link>
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background:
      url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
  }
}
</style>
